If a husband and wife are sued together, each spouse may defend for the spouse's own right, and if the other spouse fails to defend, the spouse who does choose to defend may defend for the other spouse's right also.
Mont. Code Ann. § 25-5-202
Who may defend when spouse sued
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.